Step 1: Assemble the Legs.
Repeat for the Left Leg. Each foot has a notch on one side, which should be on the inside of the foot.

Step 2: Assemble the Arms.
Repeat for the Left Arm. The plate shown attaching to the shoulder is for the right arm, it has a protrusion above the light.
For the left arm, the plate attaching to the shoulder has a protrusion below the light.

Step 3: Attach the Limbs to the Body.

Step 4: Head and Backplate.
Ensure Backplate is attached in the position shown. It is designed to be rotated during transformation using the ball joint, not opened or tilted.